Fig. 5.

After treatment with saline-alkali soil extracts for 12 h, the roots were transferred to an appropriate measurement solution for continuous flux recording for 10 min. a and c Real-time net fluxes of NO₃^- and NH₄⁺ in the roots of P. tenuiflora and O. sativa. b and d Mean fluxes of NO₃^- and NH₄⁺ within the measurement periods. The data were collected every 6 s during the 10 min measurement period. Each point represents the mean of three individual roots, and the bars represent the standard errors of the means. The asterisks show significant differences at P < 0.01